Creating subdirectories/folders (making weblinks less ugly)

Hi all!

I've just started using iWeb to redesign my website, and I'm having some problems. For a start, I don't want the file names of the pages to match the titles in iWeb. For example, if I make a page called About Me, iWeb names it About_Me.html. I'd rather see it called /about/index.html.

Is there any way to force a name of the page to be something different, without then breaking the automatically generated navigation?

If anyone could help me, I'd really appreciate it.

Thanks!